remoteSearch: fix a typo in createIcon

428876123579589a228770faab57887169fea343 changed the method to always
create a GIcon, but didn't pass it down to the StIcon constructor.

https://bugzilla.gnome.org/show_bug.cgi?id=691750

js/ui/remoteSearch.js

@@ -199,7 +199,7 @@ const RemoteSearchProvider = new Lang.Class({
                                                        bitsPerSample, width, height, rowStride);
         }
 
-        return new St.Icon({ gicon: Gio.icon_new_for_string(meta['gicon']),
+        return new St.Icon({ gicon: gicon,
                              icon_size: size });
     },